{
  "manageEntity": {
    "action": "Save",
    "entityId": "1838602488",
    "entityType": "Track",
    "nonce": "0xed6b9e82e8d0919077f53593c13a45950367d9cf69ad70e66bd562523b6e8894",
    "signature": "0xa14f4df8e2ed1f2cb58228c00460e3056e90c9dce6bca10127bc6f313c1d1aba015829841988bee7bc93852d4299fe0485f52154428cdaf3cc184f2456bb55491b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}