{
  "manageEntity": {
    "action": "Save",
    "entityId": "275169",
    "entityType": "Track",
    "nonce": "0x892973e3ee55ac15bbe3790fcad93887c44d586711560f1b361f741a597b08b6",
    "signature": "0x98cd488e75379c3dc30118fa4dcbb64f69d2a85bb8b0486fe9817f31e8d2abc3760b5c9370d55e5a7f5177bd525d3ac36c2823216b29eef571a77e1c91f13d641b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}