{
  "manageEntity": {
    "action": "Save",
    "entityId": "56816",
    "entityType": "Track",
    "nonce": "0x06cce3708a522bf9a0428920f3305846db38d2d67fae60a4604e5cc90298ccab",
    "signature": "0xa4632579db84ace865f649aa2f04c895082fb4d825fca5c9f7cb2b2e8b1ee81f1e7902c7e5ea2b6bd1a0406bd31436dd9f0abb71b7395827c8faf2d05b5962cc1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}