{
  "manageEntity": {
    "action": "Save",
    "entityId": "910876780",
    "entityType": "Track",
    "nonce": "0xde2d0301e8f1451c3bdd7efb89da56c0a8b6275be17c957b02c532fdcabe1bf6",
    "signature": "0xcd3e4c2ccee4b1239bca49877efddc6d43a2864b7be04e762a58e96e8b9ecbb35c7c5ff5d4f2f360cd9965f4aafe5f774a811ebfa9c004f1cced734b1852227d1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}