{
  "manageEntity": {
    "action": "Save",
    "entityId": "402368874",
    "entityType": "Track",
    "nonce": "0x6d6878734e32606de8f5135cdbb35553042ed92c4e5d68c5181eb719745f5db6",
    "signature": "0xaaf4bb767a9673c3fb955ae4286044bc2616dcb7a0f97e6de7860267406b86c655d8048590db30a931e0e59995dc72bf3b80a138ba1f2fd392fd433016d2d9f01b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}