{
  "manageEntity": {
    "action": "Update",
    "entityId": "517439381",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2a210e13eefa2f1ca901df6776ce6b73f04f45bdc97e42bca32928629eca7a0c",
    "signature": "0xedeb4e32ec82038f8f37c84d702a0df86ddfab0a8c530f8b0395de96f6a0be3565f5790043cddeb9d58847992a4a2be2a076b7a709d9975679a0fac03eab88661c",
    "signer": "0x5208753Af79a487Eb27DF68Ad6064d881FfEA3a2",
    "userId": "517439381"
  }
}