{
  "manageEntity": {
    "action": "Save",
    "entityId": "888892070",
    "entityType": "Track",
    "nonce": "0x8d308d0336a1d082310e7f4e5d55934e406cddd08facd4c49909c04b64fb6334",
    "signature": "0xbe53426fc502c6138f4a85668545fc4801238fed58e428735536e9da3eaa3ad045b947630965caf97c3e2a4a66fbd036295e0f3fd92fa0fbdc7814f0f91d6b241b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}