{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985972616",
    "entityType": "Track",
    "nonce": "0x4e9936fcd5cc05180e7decd4c59c0a493922da900185ff59eb889975e5b30057",
    "signature": "0xc814c60717704aef2f8ec7c6732484352545c24aa6bf500e6ed99e81cfe653ff029dbe36a934ca724bf00b618ad969b9f25562e1e1a6088eba23a33c4148f4f81b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}