{
  "manageEntity": {
    "action": "Save",
    "entityId": "914189168",
    "entityType": "Track",
    "nonce": "0xe16bca2864eb57325f5b10b6d194348401741b5335c5aa83d2d8e1d1f872bef5",
    "signature": "0x3c77a4c05d7a332b218614d2aba8609a2e500a9f44e74a9587eebbd43694c76c06efa4b0c811c8628972bc9981ea4d2e0e408df3c6332508e1d33afd62df34cd1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}