{
  "manageEntity": {
    "action": "Save",
    "entityId": "389310019",
    "entityType": "Track",
    "nonce": "0x6059ee592ec28f014031e2de6a5a6f9d8ade19fe8b123c1ca7655fc2c0b24b47",
    "signature": "0xaca9bc7a2155cfc251da485d6cdd752860d70afe0e3fb3c674c71a4ea9d1a66e75237d496f104bd58de5789f14cc9b6a24c20d282cf84a5154760c82e68bdaf01b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}