{
  "manageEntity": {
    "action": "Save",
    "entityId": "1754449783",
    "entityType": "Track",
    "nonce": "0x7852d0f0dbc64a79ca33740e044f445b3a582922f4055c187d4b32b7b2523142",
    "signature": "0x2df65d5694907dbcd4e3e849c210934bc21a0ae765fa04a13ac232cb44ff9ea9409c718c8f07a21a16f49978d2ef0acdeadea9eaba25b74cb61660a8466817451b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}