{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975633796",
    "entityType": "Track",
    "nonce": "0x67e2e319f0e03d6bdfe54d45241a4cdab18d579bce6ae19138615e4c0149d998",
    "signature": "0x34ab903da9474d02b178ae014725f60857573897a77a6bc4f61f80c2eb64e42444ab2ffeadd0cf792b5951e86864aec4c36634f61a7cbfa2225dbbecee5b55a61b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}