{
  "manageEntity": {
    "action": "Save",
    "entityId": "994658785",
    "entityType": "Track",
    "nonce": "0xd19a76c69500280ae1680ba88b10618e43513d452065a30b48d5c0d5f89b511b",
    "signature": "0xc205c566314fd020cb65b1ed674460d0f3565c3f986cf3724e4f7d58ea66aba2436d0dec21d9ca69d4bc204a5edd2408eb0fb27097d4a017909bfea2a842d25c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}