{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092992805",
    "entityType": "Track",
    "nonce": "0x54a4beb265a753a9eda2aedccf2041e519a3649bf4d1b82a0fd7826edd1c04f1",
    "signature": "0xa30947ffa3aea0e694d27942e1b3be6c00971ec8a973def98be569d7d9aa23150738c9d0c93095263d01cd2a3c02ccf4e79d1e2fea595affbf35638f1234c7091b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}