{
  "manageEntity": {
    "action": "Save",
    "entityId": "227145366",
    "entityType": "Track",
    "nonce": "0x5ec57f0a17ea0a7569058147e4ee6630284e146e46f782efbe35dff44964405b",
    "signature": "0xbedbde741258437df468b0033061b63783d8152be3333af86f675b4917810a8341f57e28ea2d830e0c172bc6e53b1a0501fa9c60e7580e0968288d227adee77e1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}