{
  "manageEntity": {
    "action": "Save",
    "entityId": "676786133",
    "entityType": "Track",
    "nonce": "0x78a99b8e4093572b8d0341188c3d109e6ee90c75db55db5159805d414f5bb848",
    "signature": "0x1d073c14447eb57750ebd85e5eb7df380f3d002c01e0e320ace80db78f9b91174f5eba18addd3addff0d62c38acf9c2b0507de9e7efbefb9db58dffa136c27c81b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}