{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0xd9d04e1ccdde87ed57915988f389f54eba340ec58386a74ea96b80d654e65b34",
    "signature": "0x394014fef21abd3102161c34dec0e2a1b7be21093f679a8432aa0e5cd35b932c3ed11dd6e7f1fa792b50344f8508b4a53bffaa212852870112509ad03da1ed561b",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}