{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x576b40f45992cb8e1792c4e9ea6c8ce60fe78dbe8754b52f470d08e06f3354bd",
    "signature": "0xe9d09da011c70f0e426ff1b4eb494ecb4ec0336188eeda489cb5aa2715d723910e71135b29d832be3c9ca6572b1657553de106502b13a52f666406c6033b88031b",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}