{
  "manageEntity": {
    "action": "Save",
    "entityId": "1372671211",
    "entityType": "Track",
    "nonce": "0x9c8c143ca1d951c70b1e3f6ce5882702f36804ff794bfb7075f4660138911180",
    "signature": "0x069b871e435cc951843d974d4fa47722a604ec2fa9587ff965397605bcabc4a5562fb26ecdae0681e30aa5ebcddac86cddfb7e56fc55e4169dd02280783517fa1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}