{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "655291147",
    "entityType": "User",
    "nonce": "0x38e91ee85adb1406f8a1233724b884ce2a90c137ab84a31d2c1a0e1b18ff82e6",
    "signature": "0xc21d861d1906712a28a34ec03bafa01e523e88cea853cd4d6a7f82650d6e0e5b6cabaf6c3c05348e92eb50502d1057ca87e472803df04196b2cb1d57960a3c371b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}