{
  "manageEntity": {
    "action": "Save",
    "entityId": "221383",
    "entityType": "Track",
    "nonce": "0x34ac6592e3f2c06b089d860b8228412057bc4dc6d81d1332b5445eb1da474c71",
    "signature": "0x46131c2a54b0952686d960eb16efec97b802d9873f17725a936c88dbc58137ca3a0eefd289ec468e4885785ef5ac36cac6f9bb497b4808376d6db525b11ef6c01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}