{
  "manageEntity": {
    "action": "Save",
    "entityId": "722067511",
    "entityType": "Track",
    "nonce": "0x97b40b238ba92197a77a081e81146929940b039d463284f1e56383a0c584695c",
    "signature": "0x1373c2b624e4ccd14857a5c9ad22b9324abf3e8072301237fee0b4069dec34073734b4f936978ca282bfee4bc26d0d408e73ebec3902e6debf147e8538f9c7981b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}