{
  "manageEntity": {
    "action": "Save",
    "entityId": "4997",
    "entityType": "Track",
    "nonce": "0x367037f2b9983bda099aba99bb286a6bca0f4c0a1fd8604ec94853c9ac469440",
    "signature": "0xa8a8510b47af693ce261f27106497ad1804e008d5f7c7551a7440af84e800bdf7ca73cf21f9b706b0040c3be9c767379fa1544528d4157ecbcded0bab7e659a11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}