{
  "manageEntity": {
    "action": "Save",
    "entityId": "576973",
    "entityType": "Track",
    "nonce": "0x8422391a683fc99d537e5e79302ce9a5156ce0cb59f3f31618abc3836efa65cc",
    "signature": "0x99967c82014f5814cdc45f6a29f85cdfbc08de8cbef9eefd9319ca94019127662ad7177be3c73bafb93992fd2c273e5edb571e87785c88c0858519f6678c63131b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}