{
  "manageEntity": {
    "action": "Save",
    "entityId": "1147641944",
    "entityType": "Track",
    "nonce": "0x8c7223510ea4487c557e15c0080def31069bed1832621da13f7d99ad94fba207",
    "signature": "0xc38b3bb27f207849ef52a9510c09982aaa6c70e3f4db567422310a3f0bffdbf45f0354ec40b583e9fcffb158ad836a3fe7c807ca0bb98e48146444e7c64bd2601b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}