{
  "manageEntity": {
    "action": "Save",
    "entityId": "1663503770",
    "entityType": "Track",
    "nonce": "0xf08ea5b0e42bae34a3f0cf3ffcf810c2f8beb1a58034606645345e70c23fafec",
    "signature": "0x712e733a8ca4874815137589cfe618e7b7fc86fa22d5057d63309586e02af11b6b62169aaa4b904849f46ed4f6ba234a1a38db2e40fabc56e4ea58fdf73c0dc21b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}