{
  "manageEntity": {
    "action": "Save",
    "entityId": "167379507",
    "entityType": "Track",
    "nonce": "0x68dc3acb586a1d582d0e130d5dc0b4b5e24f5069177431aac12317e78657519e",
    "signature": "0x0bba86238c8654aadd5ca710cfdee3d38f2c04cbaa8fd312bb15f922bec577383617b7a857523fcf7ade034ea03d4587156ce9c7d465758c57e093e9740ac4521c",
    "signer": "0x21Fd9B00abe46D332aD583DED844CE1b04f07047",
    "userId": "397438294"
  }
}