{
  "manageEntity": {
    "action": "Save",
    "entityId": "1820836507",
    "entityType": "Track",
    "nonce": "0x74a898986e5a7d5678f17d928568442030b40ea181bda5a718f942f9dc53ebdf",
    "signature": "0xe19be15ee3aa1221398ee647ccab55de8c83158740f937bc50990be4112093dd3fa7877b8d9b4486a77a8a67f6b5a9b5e07aadec08bdfadd9f928b0931413e3b1c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}