{
  "manageEntity": {
    "action": "Save",
    "entityId": "960081358",
    "entityType": "Track",
    "nonce": "0xd3f24ae2d01c0ad5caaf48ac2dcdd42f382aba702391b3bcf38a8d8112eec334",
    "signature": "0xdad641e4cd8e136db2310ce9e6e835b9ccaaf3357cd21bfff5fcd3750017267722de6855b014ea887e9aeacac03280b1520a0f959601b8c2429427efd191932d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}