{
  "manageEntity": {
    "action": "Save",
    "entityId": "2088669088",
    "entityType": "Track",
    "nonce": "0x1a5721c42ec26c68bb7dbaf31518f3f99a67ec65461b3be65dc9a07d1bc2b434",
    "signature": "0x4203a34a30898411f5f11433506ab5012b3f6bea4027d2ae8f984244ec5a32f479c754f04d7261f97d11bd0ae87e14443032df85c7c8e53776dbea561eb421a61c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}