{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0xe8e75d3f97d282cb55446f74d7ad1fc981f407d4e25ee30cd5e3b703ba5e7dd0",
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    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}