{
  "manageEntity": {
    "action": "Update",
    "entityId": "554909399",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x740f505ee00f81a4650efaaf0cad5e4c1e02b8675a44846183486e4b6141ed95",
    "signature": "0xcd6fd8951a84953c1c71723cc6d4e4aae38cb4e794f148d3dcdbc59f39ffd81a23b45d03bd146cf6ecf5ac27b8a8a0469d0889a06689c21c8d916bb24a072b971c",
    "signer": "0xA127c51d3Da0e5aC363E0E9bA40263f91F10B2A5",
    "userId": "554909399"
  }
}