{
  "manageEntity": {
    "action": "Save",
    "entityId": "1423112627",
    "entityType": "Track",
    "nonce": "0x71d1fe606ee9d6c6106be00612e37e01a1f8ac32a47d86323085647a4b0b5f06",
    "signature": "0xdef596b7ebeef7ddccf4de416a7d18dd0941d637128da945ee730af5131b4e9b3dd6a7e91e4ee671e904e34e56344727eb25986e09523a54f641a49cd45f169e1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}