{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210714150",
    "entityType": "Track",
    "nonce": "0x499adc8ff99cd996ff195e32b49c20b0b36cce3af72901435a2ca9bb2318180f",
    "signature": "0x60f07da605ceda517b9273815976d3657e8c624e83702862840954567a6cc6073e16a021f523c37d12e0d2168a1ac24ead7239399bc6495f7f3dbf1fc169f31b1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}