{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "139978927",
    "entityType": "User",
    "nonce": "0x17562c0c2d639601875d0c829192f191c69d5f03f89ca5e1a5af648e67f0fb26",
    "signature": "0xad06c3eb7c9fd8f8fd3dbcaf577576fed45e3585c57fc295687a1e8d26853ad449ab4456a1cae727f3e7387be5605e755a2df609fc5dee57252ca71a60b095fd1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}