{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688460030",
    "entityType": "Track",
    "nonce": "1794010121888772877",
    "signature": "0x736ec1f2e4b733a23e701317685bbcf3ea137fe7f32ff9474593ae1d38df95df74ced6bd95d66183e8d7723c8d19fa9ad561f0cc74e780f76a51675be047e15a1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}