{
  "manageEntity": {
    "action": "Save",
    "entityId": "352775360",
    "entityType": "Track",
    "nonce": "0x80358d375f33a3b2298550bdd2d93f804184197e10f8e6b08da74c4903990203",
    "signature": "0xdb344da60b35804d22c1d99f33fc0cd2e278854307a57db7990af2fae23d2cb17389a267444916d94ced4ee7e6f4001353cc0cbbfde2a9e37d1190ff65982e831c",
    "signer": "0x6fb79570A836Ea8554ad1D745C12769B22f1e4E3",
    "userId": "283478"
  }
}