{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249633776",
    "entityType": "Track",
    "nonce": "0xd04f777db6ab5b89480f94c28c07c661457ab9daddc248cb8ad3f66c18df4b8d",
    "signature": "0x0b43bdb30ed7c2772f995b40893f5cb1d4a82d1e12335046cb381d0060bd91a71575d4f5e276202494a57035c922feabdabf1b2a0845b2106d7b2d8563e2c4481c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}