{
  "manageEntity": {
    "action": "Save",
    "entityId": "1537309719",
    "entityType": "Track",
    "nonce": "0x0a0cee7366fbb561829737a03571da40d11220569630c16755a612e1dc67bd13",
    "signature": "0x153227652bc054771cbd6be73bafcf11eaac7ba6b7071d8e152e81c0624be86f421759ba1546d22926bef938ab1395188bf60842f54a16dfdc777883c01c978f1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}