{
  "manageEntity": {
    "action": "Save",
    "entityId": "770059",
    "entityType": "Track",
    "nonce": "0x801f14adbf66a9125bc31cb002b40fc1c0dbedf5918e277adadccbefc76951f5",
    "signature": "0xbd4ad831e0968ca6c6e3ff65e485e26b8b3ca5b9f9097e99f79c07cadb62531a334eb590198cecae080040198bef227e143c561fc339b02cf4aceb8cdcbf15481b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}