{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "102389",
    "entityType": "User",
    "nonce": "0xaa434f9500930bb72ddd0a8298b0a8c896b4c0a4d74883067c96f9a611c51d8c",
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    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}