{
  "manageEntity": {
    "action": "Save",
    "entityId": "719572207",
    "entityType": "Track",
    "nonce": "0xc4dfb03cdf8aed20aa3e74777b911a312cacd7eb7a4ef6d9613331d58a09c4ec",
    "signature": "0x8ac3a5ea8da2f96cdba151388b3f1a290f7030e61d0e9779eb3bc5f7176f34033e7265d8ad76138039e3091577f8ff3a5e40834f116349dd832656f760f0cfe71c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}