{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043915944",
    "entityType": "Track",
    "nonce": "0x9c3345f8589e850f0dd9ba868acccf00708f883ab1f5809c083b72cb10ac86cd",
    "signature": "0x77e7a03b9c9cebd70dea505f002d31c80bdb5415b070aab50164f2f6410d25406ca7f20ced4fd844225fc836c68fe480c50abba2c6bc7dc4ddcd8caece4d6e9e1b",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}