{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285298362",
    "entityType": "Track",
    "nonce": "0xbd1a00030b84b50d54aec12d637abb1269c1fffe47d13d90e9a08bac6b0736d9",
    "signature": "0xb1183faf182bf9a7ad133b65a6247444574d3733fb43e958835e2a78d90b9022339752ccc07bb9597bdd9a37e0f3f32041ccd6a22fe5fc8c76773c3c88e016f81c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}