{
  "manageEntity": {
    "action": "Update",
    "entityId": "319359780",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8016918fc8a3d0c8d919cdbbd9392deb2c0f19df42d52e39bf1045342dc7b76c",
    "signature": "0x715064b6ee572330771f97ff14924ced1413077e29f93a3d75efecabd59c69b83adf2857ac153ce9783ba59c52bd62731de162c09f515898b741012b93c5a8a91b",
    "signer": "0x520Ca5f597934BC015b2e083dd3a64CEc78eAc67",
    "userId": "319359780"
  }
}