{
  "manageEntity": {
    "action": "Save",
    "entityId": "1403873581",
    "entityType": "Track",
    "nonce": "0xf8a57e2d7962d1d3726a44cf1334f01524521b54f0891422657242bdf7cadea8",
    "signature": "0x7ad679bca025bcbcfa5a2d6d6610bd1d08a3bfaddb6785608f3f96ac4cd54c5c35348ea832407680669b1b45114d0dff4e2539b62bc8dfd5e92a425ab30cc98f1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}