{
  "manageEntity": {
    "action": "Save",
    "entityId": "1301427938",
    "entityType": "Track",
    "nonce": "0x9817c1d3f189aae79b8b65c0244c2c7f8fc4aa4b1a2ecd02f76a80c110006188",
    "signature": "0x805c714751a2e8e8f5484edb68993a62da99c7e04a9c70fe3054aaf63bcee9ac446775f98235bfb6264e195bac13655bf993bd060a9514378f8c350e2c3cc0441b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}