{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075394091",
    "entityType": "Track",
    "nonce": "0x77076082e3e7dd7b0fae2e01f44a7490221da655a776c95e996202b699f8d1e5",
    "signature": "0xd3189e0b7290f6ce69774df1348eabce3f7db8d2c5816c150933b4f54479880407f4b76c3151c704549d2f69ab3227337acd1be807f5944c8f77e6293184ae031c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}