{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262872499",
    "entityType": "Track",
    "nonce": "0xcb63826ff4ac9c98bf7b022e4a311ea3093c0399ed0732b94e3c368d4801ed79",
    "signature": "0xec4e2a78bb71f22883fadfc9ea6301be8ce945598de1a47b270053c9e18ebfa55c06f702e12eb8f24d79b93913512b25ce605d60082438c90848185b5a58a8581b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}