{
  "manageEntity": {
    "action": "Save",
    "entityId": "1830333785",
    "entityType": "Track",
    "nonce": "0xb7c4109a3ee8726dc9cbeeb6d80696f973509797daa46e8a351b8ca3b6b4fd85",
    "signature": "0x05fcdf35ad34692bb997bd5545034ec9fc28056926e4bc239e793d54c815edc324692773f14eb0af04cbcf7a47708eaf33515121fac9e589d1ed2dadc75d634c1b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}