{
  "manageEntity": {
    "action": "Save",
    "entityId": "2072646134",
    "entityType": "Track",
    "nonce": "0x277d3075e63a56a9d713e22fb50df646657cef80e4e25e7e3c1f0a53de762192",
    "signature": "0xa0ff618590663b9254d39f8e0d2cd20981cf5571d889f58582b0bba675bd585558051dff366dc67dab5c983c5f5bcbc4f4a47501796d4bb1ab4ac46d220531781b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}