{
  "manageEntity": {
    "action": "Save",
    "entityId": "951556",
    "entityType": "Track",
    "nonce": "0xf2b671861a795bb343069371f9d6c18ca922714df946e3a4640689a34e493554",
    "signature": "0x540a05322ce7e6427bdc68a23caec9491d8c3aeeaf6d7affecea58287ba0d83a0cfd874460ecb334505bd7eaf0e61f35281276b06788f1f9d10708db3dbfd1931c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}