{
  "manageEntity": {
    "action": "Update",
    "entityId": "393770418",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe77a63d1c4ccf3f2a7215b53da56473bd1238a42311e59150d3d52a5131160c7",
    "signature": "0x10091ddba9496d94e201858447ee6a566cb8472de299be7f4ed132affbcc5d2d3b76aecdf8535a07e00690724e66abe3dd48f578ddff6e47b329b431e0b0c4351b",
    "signer": "0x3c0C477ba063bfcf1E1B5Bf8228bAA3D76B1df50",
    "userId": "393770418"
  }
}