{
  "manageEntity": {
    "action": "Save",
    "entityId": "1701639012",
    "entityType": "Track",
    "nonce": "0xf3289f4a8def2112f39b64352ac701ccaa0559ec533f7be456c9f6a4481c7805",
    "signature": "0x84d3b6ee55c8866e0a0a3e7727b6dba59d1762e8f8246d5509600328ff2eb223537b60dbdf6101d29a60141f5fd2d46335e672bacbf6a3d4e991d3320369d9381b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}