{
  "manageEntity": {
    "action": "Save",
    "entityId": "786438804",
    "entityType": "Track",
    "nonce": "0xf93d3a443c4721039015551e70e4d6ad32f46a4821f32cd09044612e902d1f4a",
    "signature": "0x757913ff3eac91a661311e600ca0550bc44cb855d7e5d65cc56b17f71c8d6d39602ec97769e3b54e5508ba1c2544015d0adf74c5c0dd88a57e6b5b517b62c3981c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}