{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463939008",
    "entityType": "Track",
    "nonce": "0xdea4274ddb6afff8afb619cafae448c166f59997934463718945c535b2cfc8b5",
    "signature": "0x6145ac3efe43fa94fc8e8d9bbfd3694ac6d322e6f2daa6fe0716b94b31872b4970a07d7ed2774f0e52c20bb36b5e79d1ec2756d37f0fbfc1ddf278f2d21cf3b11b",
    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}