{
  "manageEntity": {
    "action": "Update",
    "entityId": "373502312",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0557cea5256e8435097482c5e336da63f41c6389a9f9d9ed69cf6555af2ca634",
    "signature": "0x86a9449f40c594d8ef9aaefb1c7fa822ad0f4d807669469f9872bfd69e6b84096b6a1bd74dc7a5f5803378ac42795ac70331d1d1393f82b25964fd85929311b61b",
    "signer": "0xE703Ef9a8348786D9579AA2C679a0d7154727E4a",
    "userId": "373502312"
  }
}