{
  "manageEntity": {
    "action": "Save",
    "entityId": "1509393753",
    "entityType": "Track",
    "nonce": "0x7e8f3f7217e278b545d4d35d8d5ef61a4678690fdf79b48e151cfe746bdece37",
    "signature": "0xb1e57ab48324404e38297f19d98e57024cca7422b50f7719ccd86667637d34eb039c93315047f2d51cdb94d40c6ae74b3485cd23e8fa909c57286e599df794ee1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}