{
  "manageEntity": {
    "action": "Save",
    "entityId": "1344102353",
    "entityType": "Track",
    "nonce": "0x5c214f00096dec639cf68ef4d11d2bd1f0396a4ebaed68c9a99c226e5849385c",
    "signature": "0x717b6b9d2f8c7874da7a2d6f52fb7aa9981046637f79591f66862d1dfa5f714821e8204bd293b22f75cfb3a36c2e92ea7bcc73e48c74c23df064b78a18ab3c611b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}