{
  "manageEntity": {
    "action": "Save",
    "entityId": "1502562759",
    "entityType": "Track",
    "nonce": "0xda23688a3219cb8760b1aa9a4108a20f7f328f24e32f4b00adcb2a695b28d53d",
    "signature": "0x48a93800c7c180410b02095c3953e0187797dc90e742e0ba1c3a99e76f238517625d08fd282ac42302e783a443d4b0fb827e426449774365eeefa80e9663d8f11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}