{
  "manageEntity": {
    "action": "Save",
    "entityId": "770046643",
    "entityType": "Track",
    "nonce": "0x7b959ba06567b73f48386f834e13b1ba494167dcf3a0c7191d061a0d1c1be629",
    "signature": "0xcbad57bb9ce5b5176a23a024fe6246969b28500776533089b5c2cf39cc8e268645173adf414cbf3518f5fd421ef112886873a25777e1037309f84b711d4193181b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}