{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116779",
    "entityType": "Track",
    "nonce": "0x8acb97d6e1ab94cddd400b010ac94154ea204347ac3cf97bfcce3796e8945616",
    "signature": "0x497fd0a7f7e7c5177b265a5d56b7ea3ed6a3f32e83991b8f4ffc044f0aef1f384d38ae9cc5ad99288cdf7e1a38299dfa0bb0702c73821ca7b1b6e78218e2ec261c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}