{
  "manageEntity": {
    "action": "Save",
    "entityId": "16739097",
    "entityType": "Track",
    "nonce": "0x0e2f809639de09fc4bfd2f994c7feabef677a4f54482223720c66563e1edf1c9",
    "signature": "0xb682cd7e0fb5fcf8895776ec19997909742f4e45ef625a6bfc0805058548ce96317ae244138792472dfd0038927467b5ffa194ae185e49963769c028dd282b1c1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}