{
  "manageEntity": {
    "action": "Save",
    "entityId": "1820806676",
    "entityType": "Track",
    "nonce": "0x621d7a7019656a329ee8d4a09ffa2d8df8438cb5967ee4d50c5b84223993637e",
    "signature": "0x5b5291e3196d6b7094c51949683cf58034cb56415fabfff6e6e52a258d77373b0037c2a977a86c18d8dc771d7624bc54c7d3f78fd9f0bdda8070acb3632053e41c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}