{
  "manageEntity": {
    "action": "Save",
    "entityId": "1613616094",
    "entityType": "Track",
    "nonce": "0x96cc3e4ff20fe602c84e00f375b499c45dc6282fb727db7708361a44772097ca",
    "signature": "0xd953449b4fde68de8ec49b2243824fc7f89778a602e185d016fe7f4274423e980653754086125cf744e167c6e8a7ad09b85ba7665c0eb940220299944a0849961c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}