{
  "manageEntity": {
    "action": "Save",
    "entityId": "680329520",
    "entityType": "Track",
    "nonce": "0x1fe730901ca869c1b353e59d4466b2580f4af79e7077c5a64098781b0bb08745",
    "signature": "0x3f953a19e599115866c04da18e0155cedc573fde2056aaecb29274034c9c9e8e75492bca2dc3653acf9c8e27c576a4a353d0fbfacc26cd3bb94de62f77bb55591c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}