{
  "manageEntity": {
    "action": "Save",
    "entityId": "406108",
    "entityType": "Track",
    "nonce": "0x541591be2d9c8046df2ead959cf3faf151d503c16e04e54655ec81c0b47b485c",
    "signature": "0xccc18c68349535cf6ab0be524bd2cc205f6905c779747ff787175f04b226a0b156c32efcd6f21208c438a14aec731168d67b38f7821ee58a363e57fd0969c1d61c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}