{
  "manageEntity": {
    "action": "Save",
    "entityId": "1923843783",
    "entityType": "Track",
    "nonce": "0x9ccc9aa110aad34628ab9ac7ed04099e9798fbf99aec82fd610fb4ba473ada1f",
    "signature": "0xdd94ac194b7890dd868f1e158b8e08936f6c4efe6ae8d766e69f4c5208071f1442b7e0b895eeca7163bc9a638737fdc540fc04378613de0c5b979d3012cf5b6b1b",
    "signer": "0x58EeE406DB0683Db4101A97aee427Da7951e499d",
    "userId": "147070911"
  }
}