{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121225141",
    "entityType": "Track",
    "nonce": "0x44d412f5539be063057ea3cd4281f8d63eff51e659d0e47b55ab3b39e59745a5",
    "signature": "0x78228b9f9f10ea139b8b30fe4cecefe84b094c34f8a74af5c24a5b62f98cb8cd5dac49830cdb64d118feda7821f70892f5bd35952fbcf9cd86229539c1598ae61b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}