{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "335904",
    "entityType": "User",
    "nonce": "0xf3bde6e385f0a7f12d656ba51eca7423ea5841cbada56a8e5b5405321a8864f4",
    "signature": "0x9a140fd62ae6813bf74e52ced7b9a2c888d4a795f0c9f5eb6385a5d3efeddca71701b224c0eb19cb4ebe135483a2b81cb414d78b51f86301f53e302ad8d9c2811b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}