{
  "manageEntity": {
    "action": "Save",
    "entityId": "1279831572",
    "entityType": "Track",
    "nonce": "0x2c5fdd7f8b4eccfff66de538b6c369285a948c3bcbca9bfb462529304425cc1f",
    "signature": "0xecc072b9c9656e243a30981e56eceace9c9cf700f5275564012a0716dadfad6621ee00c819e12ea543c0c74739045b2f072430266faf221b9362e8ff185f23241b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}