{
  "manageEntity": {
    "action": "Save",
    "entityId": "365124189",
    "entityType": "Track",
    "nonce": "0x1f26a14de7a4181428381a029f34b72b2a8f6005700dbfa364d65b3c7bae89cd",
    "signature": "0x65559c81a9279eff92aebe78ef8c80392da14945e8b4802bd98975609cae9af714b26470fa3cc569b375fb84c9ba62779856e75c24f309c15cd29959f5389e391c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}