{
  "manageEntity": {
    "action": "Save",
    "entityId": "574590023",
    "entityType": "Track",
    "nonce": "0x44dd6be3130a72d9390dc76f8cac038e45ac27707ebf21529f0000a362877552",
    "signature": "0x8ce872a0487c2362c2402f6b10c21498a065a06e7119a3b75b5baa9b5ae702012089c32bcb63fb64661506fd9c857b7fccc2b4a7c0e365e5ec3fbf72771c0cb11c",
    "signer": "0xd14727622fa26ECD6Ad72cADB6b96823f5fb65DD",
    "userId": "173494086"
  }
}