{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "615832397",
    "entityType": "User",
    "nonce": "0x8d395895bd2a9a07ba74570b4714bbf5512155ca14d416dd19188627eee2ac35",
    "signature": "0x9099b06d56888d1b58e347e5107e2ef02d3487cdc642504e1e7946dc890c616753a08b5dbcb0b61a8d72e9c3585ca831652958b02bdc8a3679b4d9217e259cf01c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}