{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "664568012",
    "entityType": "User",
    "nonce": "0x09e1e9e9221191a1e452903c70a1cca9ab75779a0147c4b1e8b9a3e6c94f68b3",
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    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}