{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512447",
    "entityType": "User",
    "nonce": "0x8b640567b2b159715d9dfd4ea1a5e9d1d64ac5d2026b5c6656cef43fc8505a70",
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    "signer": "0x675366e39d19EbC2D10f111F5A52397F7f40f625",
    "userId": "829793830"
  }
}