{
  "manageEntity": {
    "action": "Save",
    "entityId": "1127412",
    "entityType": "Track",
    "nonce": "0x9f2af41ad6f2b0f77e508af3a4ad3aaa508054628d3b28e85e8f1a371ab4b6c5",
    "signature": "0x999b9746f2d77999d0accf34c96d86b4d5e34aaea34057c98bf14717966a4c0f233c5af7f42e29d3808668663fa425cc5057669a6e1bf859d45cf8d244d8bc2d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}