{
  "manageEntity": {
    "action": "Save",
    "entityId": "1713576488",
    "entityType": "Track",
    "nonce": "0x8f7a80c45bb88aa5e62d53e7edadaf48b95fd04d3a9c0767cf5d5428d314cf9a",
    "signature": "0x0ecbe9c780290cf4c1d5587545f8c2c09b372b19ba286feaa6a182a0463a2e8c002e68f9962ea60383d425e79fba0419d3c02f39b70fc81f5c5a349efcf7db021c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}