{
  "manageEntity": {
    "action": "Save",
    "entityId": "1186138672",
    "entityType": "Track",
    "nonce": "0xb697c68e24addddfd4e532df6639120b9aeff8599df6e839a2121f8a58d67281",
    "signature": "0x3538b51bf41d54131d97d533ded23b2144e87535d495ac4b68e92ea7347917fc57282d3caf7e3321c23a5afa17cddbac2292f47e08b14bfafa02934c96bda2c21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}