{
  "manageEntity": {
    "action": "Save",
    "entityId": "502387264",
    "entityType": "Track",
    "nonce": "0xa4fea20893accc25368951c72b23441599308dcfb610fd21ce90089ba3d95a06",
    "signature": "0xdd44a54af7c6d126e1652086c3f779f76c66ed2e954af1eb29b41a768eeaad9c1a4d0ab4f243e6031dd628ae84cac7838cbd0bf315a2b205a97d44ba46283a291b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}