{
  "manageEntity": {
    "action": "Save",
    "entityId": "1254577619",
    "entityType": "Track",
    "nonce": "0xb5c4794e8bc2bd637b6896a3e7b4d53fe83b3f805c882c92623b43c802e2c0f2",
    "signature": "0x9a4d15bd40d584b43950c449467680ca7b3df92c21cd255fee57757e38e4400f35bc6958bd592b945a409662d3218d139c6347ed82236c730ea1140b0f8380571b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}