{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808860049",
    "entityType": "Track",
    "nonce": "0x9b7811f9cd64c1d2fd7f3f1de48f8cf188934f483a5e049fc4419958d62f9147",
    "signature": "0x7f9042e3ce119ad3b1bf04ac7afca8fa9c1d8931818f5a991643027bd7f39fb23dbe964f5a68d7660cba1c6638d1df223452efa99a039a731efa489c6e0d82f81c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}