{
  "manageEntity": {
    "action": "Save",
    "entityId": "1480700685",
    "entityType": "Track",
    "nonce": "0xc01ccf7a1ae6f07650c868ee2c4bdea4389cbb1bedb6f3dac1dc460b284f1c05",
    "signature": "0x0080e40ec40f2a034d46d74baad9a82cc0c7ed19448a74feb276ded6e43c00cf4cbe9283cb0df2b82b4eaaf1af6f164853a30e3d007dfaff460f07544f7fb8c01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}