{
  "manageEntity": {
    "action": "Save",
    "entityId": "946921588",
    "entityType": "Track",
    "nonce": "0xc4ad88008eed2cba9d37d05c380595f730d402117a29180447c07e3be97c032b",
    "signature": "0xec2e6dcae777b21482d62b497bacfe9353496c767970c3267a7d0414d5f80d9c20340a2388efc9b4f997866f68366c3610b51502ea26901bd3a7577d50fc66dc1b",
    "signer": "0x6B239e9B75f27b519de7Bad3a26a0b7d30e32D3f",
    "userId": "311257477"
  }
}