{
  "manageEntity": {
    "action": "Save",
    "entityId": "1789783469",
    "entityType": "Track",
    "nonce": "0x5b017782c682c109a925ba5d5efd7e13e930e1177519b75d746b8db8382a5e7e",
    "signature": "0xbcf88a0c9f2646fcb98ac3eb84b4391c8bbb315a37b9494b47cc1285425160f53edf5322f8ee10ca4145d40b48091dcb6caeaa561c657ad8ec4d63b7b28445181c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}