{
  "manageEntity": {
    "action": "Save",
    "entityId": "725288155",
    "entityType": "Track",
    "nonce": "0xdc7646cc7eafdcb85a3f38eeb71006c7aec8b400df5187c7c3ce01f6260ce301",
    "signature": "0x7f847a5b4cf3a32e102c1ad8e2a888daa1b30ce912151dcbee5f82601733a6925c2a6e204a77dc54c2b9a308ed1bdcf0e9a62be23c9657d162114beb835a535e1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}