{
  "manageEntity": {
    "action": "Save",
    "entityId": "313221144",
    "entityType": "Track",
    "nonce": "0xdccd44bf740a7eb7f4b281280a48124ab39731eb64e738a55dc49002a5127286",
    "signature": "0x4f67449c0d83a0e5b12e4b267502f463fd8374802e5374084c761b93e742be6d7b8b0a5d2f43c3fc59e78ea6b3e803ab3c7b10e8fe25e66fffed54bf9d83790f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}