{
  "manageEntity": {
    "action": "Save",
    "entityId": "838715313",
    "entityType": "Track",
    "nonce": "0x0686643b6c25685d5d45137b892633ded56a2a6893e13017ef442af792137a7c",
    "signature": "0xb13202ccf1b00a14cd11869bbfdfc713cfc5d77315408cd16941bd503568133568e7fb882367a003c088f304c1deb285df7caef2f8e0f0f78f8e55099b98b3a91c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}