{
  "manageEntity": {
    "action": "Save",
    "entityId": "1744902210",
    "entityType": "Track",
    "nonce": "0x8e3240902f84e8ce08453b922011089c5fc2630924b8a4ed161aa7a92ff40410",
    "signature": "0xe9d8d0a8c69b7a5169e5b70db4dc8b26bf2806b691b98c27a9e8b6c0aba654247f348530592d918db4a4d9ef2bea953a4deb185838e20e4be7e44cd3ee9925631b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}