{
  "manageEntity": {
    "action": "Save",
    "entityId": "48743054",
    "entityType": "Track",
    "nonce": "0x7bcb6e03090c89d9d7353aa2a7dd3a996c665fd56a747f96a2861bf2bd88bee7",
    "signature": "0xac03fed90341a2474554e11fc4368e418e5b97de1a8da30db6c4086ea48875137a73040b452ffaf78a511f852aa1813c1bc14bcdda414d31c1e99f2e2a6292091c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}