{
  "manageEntity": {
    "action": "Save",
    "entityId": "541252",
    "entityType": "Track",
    "nonce": "0xa1b4e962f104c0d09583b14458136e415f373e41d4ad4db08a549f560a69a67e",
    "signature": "0x97a769cd1e0375cef474d038cd1aeac8786c1342ff4cf5bb1d12d13f97c2ecc2739bb37cc8ec1d6b925e2380f6cc6d6a74e1667b30e3d20ddba4f6d955ad99b41c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}