{
  "manageEntity": {
    "action": "Save",
    "entityId": "1290982640",
    "entityType": "Track",
    "nonce": "0x828bae3be3d64fa55a5ff6e824eae2dd5ced7266cb6a24b8330caed4ac15b923",
    "signature": "0x19995ab6b83028516333f76921f8c39679b73fb772d45145ec8ab34449c60bff74c2e0c8d939c88787e628b4161068d39ed38ff1151ca11f6d4453eb919b9e221b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}