{
  "manageEntity": {
    "action": "Save",
    "entityId": "56933007",
    "entityType": "Track",
    "nonce": "0x1bd0db60574a8ba9567407a2943d1a42246cdd16c3abe4c94c3acc7322145e80",
    "signature": "0x366255d61686815e030d3a752a8ec21a83f93993aa31d8b67f6f0a1c86b98fca59c44c20b6692ef4f03f52c99525bc846fd77ad3b9a47e522c6c24a292db5a031b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}