{
  "manageEntity": {
    "action": "Save",
    "entityId": "785325",
    "entityType": "Track",
    "nonce": "0x1c6b3bc1d63ac14d5758c795386fca9ee40ee4dd5f8153e77962f92cd7f8dc50",
    "signature": "0xc8355a75952b6d8d379bbc967385c2411dc0c725af253d3eba9258e76c74d5f551058131faf508ec22ef85c561210c9dcaebfbf95be117ccf9bf961573afaaad1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}