{
  "manageEntity": {
    "action": "Save",
    "entityId": "1870093353",
    "entityType": "Track",
    "nonce": "0x5408ae9c56952141c9bc9368129e6eff074bec4e8dfdc52695ba6c4086e35020",
    "signature": "0x1e06c666072b3983c1e88c9ae151a920ef424808ebeabec6f8126f0a276d360a24e83ea24477db02db28c03e74c84c5a2e216bfe02375f7b53c62c1ecbf9c22a1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}