{
  "manageEntity": {
    "action": "Save",
    "entityId": "1234261538",
    "entityType": "Track",
    "nonce": "0xb7c045f75928330b7b1956abc32ba70d46eeb2209aa8edba7cdc8e43f364a7df",
    "signature": "0x5c94995f5b8db6b1f4d9e61775df0b51323ea33c08f45636cc0b230b7daa6fd86a5fa219ecd3c5ff673fa35ac064d2d1c96a4d1aad318ae2078332b2e407dc601b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}