{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "297007",
    "entityType": "User",
    "nonce": "0x64e9f5cf0aa0ca9223ceee204669eb80f82c0bb9f2f9af2a0e20e745c1f4102c",
    "signature": "0xa124522a38b45ef5fcc5264dec4becebb4e6211e57efa22d699e136e489c8c7d7a7abec1541a49627f98d3acc1898697bce6c7ad370ee1cccff24d9b0a7481761b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}