{
  "manageEntity": {
    "action": "Save",
    "entityId": "676073",
    "entityType": "Track",
    "nonce": "0x16dd99134639fde397d9850b5393ee222af8775d89ecf43ef30ab2c80b0ee91f",
    "signature": "0xfc76853c77ad6a1982613d4c801eb941631218ae2d512050c7c2acd3873c616b3528814f35f133fe769ded954fd51bd5c0be4c2b7ba24ee0bbe62daf8d0ccdeb1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}