{
  "manageEntity": {
    "action": "Save",
    "entityId": "33628713",
    "entityType": "Track",
    "nonce": "0x545b5033d718acbb75a98f12587ea694d5b1fae3703c9c0a2120283821dc0b43",
    "signature": "0xc8c83bd10ee065c9423221202384225d9f66872dd3f73cb7f4411cfd692aa6bc22f076cd584c4c71457f42b7f5093e228df87a6b9ffccbd7458298c390aa3ae61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}