{
  "manageEntity": {
    "action": "Save",
    "entityId": "1552717658",
    "entityType": "Track",
    "nonce": "1787507706282822461",
    "signature": "0xa069087c2a6bd1bc407dd11b71e061130c71f504de2b2196df63b0efd4ecb5401df2bf02ad4073d47f21656ceb6b9218731c7acce1fca97a730acbf93f5658a21c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}