{
  "manageEntity": {
    "action": "Save",
    "entityId": "1399777346",
    "entityType": "Track",
    "nonce": "0x2e3ff15519827113392164ddf9d77c5e0ebb92117514054566bcd6e264f36c0b",
    "signature": "0xf684354ef4016e25ff73830e88ad6e9c8ec88c2cf13ed53445c360bff54eb4792f71fedba3b77b8aedbc03f671788f1b4835fa4b831bd66d33dddc2df18c8ea11b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}