{
  "manageEntity": {
    "action": "Save",
    "entityId": "774910001",
    "entityType": "Track",
    "nonce": "0x3a057d1c7ef2e206910a5e4fe318890d1e1ce5e04c5159ba0c92442c87de806c",
    "signature": "0x3d669e1dcda068d76dfe57e566b5dd6a3df902b7445e2b32e546f5f2269d050e071ee3b98d203f056b516adfc81bdf78dc3222a34506d15c64f4c055d76720051b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}