{
  "manageEntity": {
    "action": "Save",
    "entityId": "1439332163",
    "entityType": "Track",
    "nonce": "0x4357f0914889f26a81733039bae412f0a5c3c716022019c8922c124f6cbaa0aa",
    "signature": "0x6a3863cfdc282b795e76d36e12938f8db9ad7b15383237cbe6ecb7a4d5161d1a0251fba77aa56957f2ea38b83cd9175e53daf14d1e278963953b775483e1f9cf1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}