{
  "manageEntity": {
    "action": "Save",
    "entityId": "655853825",
    "entityType": "Track",
    "nonce": "0xcb64846943f2d0f66db8c635bf26d984288f08b1dff0f966f8a7f93727628a50",
    "signature": "0xf368f578405d3f4e3774fa0258567e13634724f32f490358c52af3d08d10b6a9602304891df96bd98901859db075ef0f49c281e093104b4fb64e42755f3a65e31b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}