{
  "manageEntity": {
    "action": "Save",
    "entityId": "242584465",
    "entityType": "Track",
    "nonce": "0x5e87ad201dec899ab13d0f17ec8768a09cc387bb2f6a6d5935636ffbbeb9aba5",
    "signature": "0xf9d26a3587f4f9bb410bce073514ed27ffbf249ed5b0588bb3daea26596f17f619b29f575e8cfbc3f21e75d1243c665c0b63aa19f6c75b3fa7c30deba50c2dc21b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}