{
  "manageEntity": {
    "action": "Save",
    "entityId": "655124",
    "entityType": "Track",
    "nonce": "0xd857f31b267ea0694a826350f1832e2dee5d86552b3d5daaf81e4925f4bc1400",
    "signature": "0xea4a440c855768b7fd92041a47a5890b3473d78cde33f23a186656e8047a05582e0f7c93c027ab2d2de8ee16cce37ba85360a149f92fb62649d6ee6b0792845d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}