{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910299991",
    "entityType": "Track",
    "nonce": "0x6d8b1fd9778abd8bd3f0a2f15ca094659d98349df992962fa846933e2cd02757",
    "signature": "0xe270fe136509bc05c4a53090ba920fb4c13223f6a559ca5903833bebc73389da1a93fa08be58e0386367615a1c71a31f63a7204e9c7dfa903551a03c0ae36a221b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}