{
  "manageEntity": {
    "action": "Save",
    "entityId": "877578610",
    "entityType": "Track",
    "nonce": "0x6abce8720aa5903b64cf16cad565cd44950d2358dae3b34099aee75940f965ee",
    "signature": "0xa068f4cee7ced229d2777c0d957341eb26da65622a173d479160b7dcbb99b75372b45b1be7b62fcdff43233a4441408ffe6c76af807a61fa7aa0c0f407d434271b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}