{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199948066",
    "entityType": "Track",
    "nonce": "0x680c61599b52f583f35342e34d6d2d1e45acf09b818bb1e833f7e973396b5110",
    "signature": "0x21c67ef03c1b2cc1f246f505f81e5206c549c6e4bf2a52e58823a297e0257af1141baa048e1dc530689bcee851e55b40bc420c8771a8d73889ddc469bfc8cd881b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}