{
  "manageEntity": {
    "action": "Save",
    "entityId": "125978897",
    "entityType": "Track",
    "nonce": "0x6e28452d58ef2254e04dab25a8a579d400a16ecc468e35db9c9fda4cc10b5851",
    "signature": "0xedf15992c8cfbdd23becc578a21897c4ff579f05e0328134e20dc5039dee54dc78825e547051b643165e550f50169a0dcf4e05d56d10d29f4cec4e0d4154c5c41c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}