{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1234772",
    "entityType": "User",
    "nonce": "0xb3384aa0fe108e43eb43c3ee66c137c1affe3b511530395938e43d2f94bb3685",
    "signature": "0xc3342d92206cb488aaf90e4c6f22d164f49fd9fcba121eb7f3a25e2c17285d7e4c9c72e54c3e178c612024dfefbe787b647daea344542f246615733ebe7c31ca1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}