{
  "manageEntity": {
    "action": "Save",
    "entityId": "704097534",
    "entityType": "Track",
    "nonce": "0xd96d9428fac1488932d8362b4bc9fa5303f0a1051a03d70f9b2646ad5f65ef42",
    "signature": "0xdb8ebb218626b19b9fcb0c92a6ab79e23ddaac2eaf0d2213c6944c7bc3c3a8075fef11deae982084a9d9627029d855fdfa9992ddbf19d08a9756323de6d30e261c",
    "signer": "0x705C3Be1F27A9694A390A0a58287440a6b43349E",
    "userId": "193978537"
  }
}