{
  "manageEntity": {
    "action": "Save",
    "entityId": "108046",
    "entityType": "Track",
    "nonce": "0x77ff60d98932b5c63aa01bc18244a22b978d875060528336f41f195f8ba8b407",
    "signature": "0x0887edb020f5803063dd4f51483859d1caaeed51d02ac224f2a4d01ee1e194e427ed510142cb46f2a2cadaf97a28df4cfb5428aeee68f0253a843bdd5fe233101c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}