{
  "manageEntity": {
    "action": "Save",
    "entityId": "321605024",
    "entityType": "Track",
    "nonce": "0x74b82beb03764c1031457e34cc1e6083acaefd8f43aa71af040cd7100ab38af8",
    "signature": "0x1fd89f2c1498bf1600408ffcc7e54133c26445e4d5ffd8b554d4edac65758e5e1f88bfec4a8e0d0d7a405db27546647e71a8bc379c50c4f4f53073006d8961831b",
    "signer": "0xE795526f098824a87a94C79d58a4299b51b20a3c",
    "userId": "837713671"
  }
}