{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123373",
    "entityType": "User",
    "nonce": "0x3ed481cb100de5dfc952c928306052cbc498b8f83f12e932520c6bacf062beb2",
    "signature": "0x60231b3f931f72c52ecae17dd03926c07932d14fabf1e37cb9e06104520be5df314319330237cb68038e3db43e220c4d51ac1d5c4a2c7ac8fbbeda1e798cd7d21c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}