{
  "manageEntity": {
    "action": "Save",
    "entityId": "524500381",
    "entityType": "Track",
    "nonce": "0x8d494eaab7c58623dde1366ffb36ee250698a68fcef430db083b87bf945dcbba",
    "signature": "0x1366947e68b6151ed7e449dd8eea762c124ab8e680b069d1e8d0d54178ad151d522e99779efde38851dfc9f5a9f44c72cc85a304710981abadfee543032a2b511b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}