{
  "manageEntity": {
    "action": "Save",
    "entityId": "194530616",
    "entityType": "Track",
    "nonce": "0xdf2b2ede10f364cd3828de212b4cd39420878ed2cb51141c792bacfa6dbac43b",
    "signature": "0x5298343e3288027488589e7540a2df31f9065849ed42a3f86ca5b80d96598be571aae0c05fc32afc340e5694fee394121907cba5da143b46df76c6edd4540a8f1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}