{
  "manageEntity": {
    "action": "Save",
    "entityId": "777026392",
    "entityType": "Track",
    "nonce": "0x1960cb0d77e9d3d63dd3f62f2a116d8fe33d0044adcb5222a0ce41836967096b",
    "signature": "0xa05d89665f6ccf24753469db9061bee9496b4f7d1bf69f70792db614258979d35ab0ce3c76d65fbc9bc900684a9cec55a1f8a258b140179ac7bab41b0a9e4d241c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}