{
  "manageEntity": {
    "action": "Save",
    "entityId": "865042194",
    "entityType": "Track",
    "nonce": "0x13f1d35e117b7ebb758f161c7525734cc4cac440e01e161946e299fc486f7df3",
    "signature": "0x49bcaec2611013803c8e01a0936db4e98976e907eefb4ca38a9a85429b977b351f91eb504f380a312fe9f3f7326bc5d305f05c11029d5b4c0242a9495827d8e31b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}