{
  "manageEntity": {
    "action": "Save",
    "entityId": "1884856657",
    "entityType": "Track",
    "nonce": "0x0751213e69d255db53a53635cce3a6cdbf284d2f7130bf08629c038ee56d69cf",
    "signature": "0x098abf1047c01aaf07a62abd0f7817948806293332ec821cec84e8af65002665531fc95f88b309ac3c7f2f2c3a60d1d5bc6c8522ac06cc9625842201607b68411b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}