{
  "manageEntity": {
    "action": "Save",
    "entityId": "1402717284",
    "entityType": "Track",
    "nonce": "0x7d88fe9d185fb1a27805b7d535fac843c48ebe4aebd9aa77663f8a89eb3557c4",
    "signature": "0xf8782e627edb2979020ebc6c1290eec4b8fcbe0134ef816e4faecd7471f7cb1b6e7baeea4df6d839b2dd1232876af7881415031d2a698d3f4defcc37390248f71c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}