{
  "manageEntity": {
    "action": "Save",
    "entityId": "994694",
    "entityType": "Track",
    "nonce": "0x9de149580f53d19d08edf9713a6b24baa24f19016a8651045870760fe6a5b6aa",
    "signature": "0x7ba96398fe793336a5f963d579b28ca92877cb8aa50352a9ee0243ff1293871e569bb3ee230326538f12d4dc977f5b1d314eddf8b2585b96cdf7a24a10c3df6a1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}