{
  "manageEntity": {
    "action": "Save",
    "entityId": "613724783",
    "entityType": "Track",
    "nonce": "0x80a8be0deff90cccaa8ed1c0611a318cbb82ba7c284951ab65fa3b03215a016c",
    "signature": "0x74d10241f9cd737b8f9b8a197d28986de62605bf002fec7fe426919b470968ee243652bd5653066a2fd8641477b5b1277351e3c0a3e9b0f22cfa3e6e2fdd06991c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}