{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "253974",
    "entityType": "User",
    "nonce": "0x3fc447d22d03d092bfcbc3a1ae7b70869961aa54da9999c68bf758eb7da47d71",
    "signature": "0x9dd440709e4779b421b0a4aab077cd168928625a76a4cddb89a6a020e508fff80f9e244b34987ff9070ba887d54c52f5ec05b69507238341d5292647f72f76651c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}