{
  "manageEntity": {
    "action": "Save",
    "entityId": "1912016960",
    "entityType": "Track",
    "nonce": "0xcbabe42d198400cc1aff5260b8886946cd20edc2c9b14dbee8b5009ebd3f9d00",
    "signature": "0x14b39038be8ef2b18f34934e61eacd2ccdb8f5ff91f7ead66d04eabefb0f452b340958cbe5ec3513e824a6a9766008ef02c4d101eaae274f4b6df0b29023ad471b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}