{
  "manageEntity": {
    "action": "Save",
    "entityId": "895578362",
    "entityType": "Track",
    "nonce": "0x41b5b5962afa381c3b400d26ce5bc0926a8e7c100ea4695b43deff2b1e32533b",
    "signature": "0x2ed39d333eece03694b7758d1f220fd4a60c63c106b45c4e544e5951f925dc614f45d9d79a05313d923fb50ee9dc665d6e4e0b1cd37955259d94a34250d1cd061b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}