{
  "manageEntity": {
    "action": "Save",
    "entityId": "1088320579",
    "entityType": "Track",
    "nonce": "0x751b72daf5de5b135c84b8fc94995cc75df8549a77de75a913c003eaa423505a",
    "signature": "0x73ca06f98f6c0434c87895bfdb327f05b34572d808763dd1b88bcb64853a29464cfb072e555550b28b77ebce917ea27cceda6b85f5531292f86913fda5bc52181b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}