{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119277447",
    "entityType": "Track",
    "nonce": "0x6e1370ad83600d99838d07c77ff9fd6370da44bd64cea9029be56e1e5178f82d",
    "signature": "0xe311cb2368821397ae64f0314c99835dd139122d41b78e557f439183d4511fb23c9374f9f9bbc7d490e225aea1969bdf74672f8fd51ea1040d52156888256e321b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}