{
  "manageEntity": {
    "action": "Save",
    "entityId": "611138",
    "entityType": "Track",
    "nonce": "0x1ac181abf546938a6a570d48ae69c3284c437b2f26c656242b38afa8f559d97a",
    "signature": "0x1bd801f5379302212927932a5710f0cde0acb2f67b1d91ad75e264838a60574c179294c915a69ded50837c94d2c9d7b113098daa73a8b93c0171c18a1305e8291b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}