{
  "manageEntity": {
    "action": "Save",
    "entityId": "735260067",
    "entityType": "Track",
    "nonce": "0x0de74cd803cdbe5a3eca8b243d6b1dad1ba4cb19491a4d009bb52b9ab0de79a7",
    "signature": "0x503f4306b63e4b9b84b957638e008a6fe33eec8bdef289885778a4e35745538739aa87dc8131c4b3db3ac0c1d0faaecc6da9bb1887151fe3a3817c57d8b7137a1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}