{
  "manageEntity": {
    "action": "Save",
    "entityId": "77822976",
    "entityType": "Track",
    "nonce": "0x557ecde3d3cc9435f1b0e73e86abeea9134d1ad28992bff90691e11236da45fe",
    "signature": "0xc22d91556c345f77a2e870ce682cfe0a991214f3e8f04f214771f93978ad2e763b4d529b7483496017c70d270b98930416b07f067a57f357a8bee39a4a78d1331b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}