{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "763473",
    "entityType": "User",
    "nonce": "0xb4749151718ebe60b5139626a7a2d7bf34489897666398fbc5b4072e19a2ee0b",
    "signature": "0xe0944f346110aea042610ddf0db0a9a6480778ecc73a3f7d351b2446a549db71557ae4184d920862fe7baf974e5b0ec666e12f0601796339d7bb64b5eb83baca1b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}