{
  "manageEntity": {
    "action": "Save",
    "entityId": "655922920",
    "entityType": "Track",
    "nonce": "0x30f520e007ca4c2b9fb55d4cc94f0d629bf6be62cafd8d8e2b6dd65c3044cc7a",
    "signature": "0xfe1778db70a5dd74b4f653c0bbe4b986c0ea6d15d751fac3b011e65684bd841342e91fe0e221175fcc1a78b718f88ad629d472e06e3006fddd1eb2bb1e08c9d31c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}