{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304051",
    "entityType": "User",
    "nonce": "0x5f3832300109b533ea3deaf6f983c8e1be1dfe115576aabbea82fe4277b5b834",
    "signature": "0x69ca7a0886efb1825411bb23a0d2dc847f9a4a4b2abf7652b7dc9ef62b80fca1438b2c335733aea2b5826bdd71b2988cbf9a98b95c3b659395a9aa7765f6777e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}