{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142147373",
    "entityType": "Track",
    "nonce": "0x15de1af825ca1ee4c786de65d37bd273ad8cb21fe73961a2d76bd7ebf8fa705d",
    "signature": "0xb245ed6c082ab0305bb4a92ab2979a256708cde02cbd404c5f4e5b40efca926f06842010e6b0a40ee1a4b6154106823b4466fcc86070dee449ebbb6ab5deb43a1b",
    "signer": "0x8ABB345caA80ac50Ef3E59FA70c4Cd390f8BeBFD",
    "userId": "138896454"
  }
}