{
  "manageEntity": {
    "action": "Save",
    "entityId": "140881",
    "entityType": "Track",
    "nonce": "0xf577304eed64256b5b01f481cff524d79a6fad58bff2b696ba28fe33566d58f4",
    "signature": "0xd26fd4209cd258afcfb4e5799239bd910154bb35bc4d34fe873cb8d9012c770c3574d9545ebcff62f6da8a56bb3ed724a3ace26202271a562d9a7827b3f1e6731b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}