{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105252",
    "entityType": "Track",
    "nonce": "0x237905b9670a1553903e03ca3a4e4a63537e7f6538b0b9f6a23c70baa566be6f",
    "signature": "0xfa40350932fec9822938c8d528a3ee0aa615c45fd9693e9bacabc46f52f3f5bb19947c2f3b28daa5901770df974f0fd0843205a96a5322104333a6533d4f28201c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}