{
  "manageEntity": {
    "action": "Save",
    "entityId": "511059379",
    "entityType": "Track",
    "nonce": "0x3c387c69dc5f69c2192c5dd71c5d9d13c835a101b22d83896ca1d7ae05cbe5c8",
    "signature": "0x175aee5956b09a4ad35100c5f6d02037b223d6989b30c1a177223916ffc57e641ed20e7c3268aac34eb01f4c3de3316888f86250b1eca3eced8a762447f6f8f81c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}