{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073300771",
    "entityType": "Track",
    "nonce": "0xc0f228f2cd3e493494419f0b3ef6fc4290149b65c3a36e3492cb5ed110a70f06",
    "signature": "0xb8821d79cca404647e1095e1b89940e751f82aeb154c9377fbb6b76170b03f317e78f80afba913a712be38372308818d7860ee876108c7b0783992eb538c361e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}