{
  "manageEntity": {
    "action": "Save",
    "entityId": "569004747",
    "entityType": "Track",
    "nonce": "0x17ae81df2480fa5066f2c4769a721d3caee3a94a3ca6d01608eda2e13ad4c612",
    "signature": "0x24de3fc7702ce5f655140c8610ec42e39c9bc2a5d7a686db75326b79892d971a6ca29db3fa8ab73ba313d11ff79d7b4ca8703018778690fe615bc4debdfc0f881c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}