{
  "manageEntity": {
    "action": "Save",
    "entityId": "1374386735",
    "entityType": "Track",
    "nonce": "0x9b13f0cf7aabc35a53fc774246fca6d312cb73c4b2474504f5f14ac4709ebab2",
    "signature": "0xbdd465a162dee4ce5dadd8f56f3321abb3137394f8f60ad94a14470720c5e9d65e3a3564aa03f88244ecb82649ff719621ff9d12611a1fbfc2dc803ce3a543f71c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}